Abstract
ISW for the Treatment of Bilateral Posterior Buccal Crossbite
Highlights
Treatment of posterior crossbite is considered one of the most common problems in orthodontics. [1-7] when an arch-length discrepancy exists in the posterior segments, the mandibular second molars erupt lingually producing a posterior crossbite, or a scissors-bite
In patients with bilateral posterior crossbites, the buccal cusps of the maxillary teeth occlude to the lingual of the buccal cusps of the corresponding mandibular teeth on both sides
Our treatment objectives were (1) to remove functional interference over bilateral maxillary second molar regions, (2) to improve facial profile, (3) to establish appropriate overbite, overjetand arch coordination, (4) to establish indivualized occlusion Due to the fact that the patient strongly refused the possibility of orthognathic surgery
Summary
Treatment of posterior crossbite is considered one of the most common problems in orthodontics. [1-7] when an arch-length discrepancy exists in the posterior segments, the mandibular second molars erupt lingually producing a posterior crossbite, or a scissors-bite. In patients with bilateral posterior crossbites, the buccal cusps of the maxillary teeth occlude to the lingual of the buccal cusps of the corresponding mandibular teeth on both sides. Both dental and skeletal factors contribute to development of posterior crossbite [8-10]. The cephalometric analysis showed a skeletal class II tendency jaw relationships (SNA:89.0oSNB:84.0oANB:5.0o) and dental compensation (U1 to SN plane:111.2ointerincisal angle:119.0o). Our treatment objectives were (1) to remove functional interference over bilateral maxillary second molar regions, (2) to improve facial profile, (3) to establish appropriate overbite, overjetand arch coordination, (4) to establish indivualized occlusion Due to the fact that the patient strongly refused the possibility of orthognathic surgery. After 5 months of active treatment, on 2007.09.07, IME and elastic chain were used for space closure and better cusp interdigitation (Figure.[10])
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